{
  "manageEntity": {
    "action": "Save",
    "entityId": "544195",
    "entityType": "Track",
    "nonce": "0x0cb349e440f933b425671946bea93103fb774c71d15d44eb24d01b183b0da5cd",
    "signature": "0xd5703d51e1b53d84754c2fc0b8a43f1ac08470b98ec96531dd157bb090f2c1a80ecc6ec54af4c08625fc02eb5eecd29cbbdf16eb44f59d9fe05ac027193211a31b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}